{"common":{"save":0,"post_id":"8542","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7698","post_id":"8542","mon_id":"1159539","chapter_id":"1159541","question":"<p>Nung 10 gam Calcium carbonate (thành ph\u1ea7n chính c\u1ee7a \u0111á vôi) thu \u0111\u01b0\u1ee3c khí Carbon dioxide và m gam vôi s\u1ed1ng. Gi\u1ea3 thi\u1ebft hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng là 80%. Xác \u0111\u1ecbnh m?<\/p>","options":["A. 4,36g","B. 3,36g","C. 6,54g","D. 4,48g"],"correct":"4","level":"3","hint":"<p>D\u1ef1a vào công th\u1ee9c tính toán l\u01b0\u1ee3ng ch\u1ea5t và bài toán v\u1ec1 hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>D. 4,48g<\/strong><\/p><p>S\u1ed1 mol Calcium carbonate: nCaCO<span class=\"math-tex\">$_{3}$<\/span> = 10100 = 0,1 mol<\/p><p>PTHH: CaCO<sub>3<\/sub> → CaO + CO<sub>2<\/sub><\/p><p>Theo PTHH 1 mol CaCO<span class=\"math-tex\">$_{3}$<\/span> tham gia ph\u1ea3n \u1ee9ng s\u1ebd thu \u0111\u01b0\u1ee3c 1 mol CaO<\/p><p>V\u1eady 0,1 mol CaCO<sub>3<\/sub> tham gia ph\u1ea3n \u1ee9ng s\u1ebd thu \u0111\u01b0\u1ee3c 0,1 mol CaO<\/p><p>Kh\u1ed1i l\u01b0\u1ee3ng vôi s\u1ed1ng thu \u0111\u01b0\u1ee3c theo lí thuy\u1ebft b\u1eb1ng m<sub>CaO<\/sub> = 0,1.56 = 5,6 (gam)<\/p><p>Do hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng là 80%<\/p><p>Kh\u1ed1i vôi s\u1ed1ng thu \u0111\u01b0\u1ee3c th\u1ef1c t\u1ebf b\u1eb1ng 5,6.80100 = 4,48 (g)<\/p><p>V\u1eady m = 4,48g<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 07:58:45","option_type":"txt","len":0},{"id":"7703","post_id":"8542","mon_id":"1159539","chapter_id":"1159541","question":"<p>\u0110\u1ec3 \u0111\u1ed1t cháy h\u1ebft 3,1 gam P c\u1ea7n dùng V lít khí oxygen (\u0111ktc), bi\u1ebft ph\u1ea3n \u1ee9ng sinh ra ch\u1ea5t r\u1eafn là P<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{5}$<\/span>. Giá tr\u1ecb c\u1ee7a V g\u1ea7n nh\u1ea5t v\u1edbi:<\/p>","options":["A. 1,549 lít.","B. 2,479 lít.","C. 3,719 lít.","D. 3,099 lít."],"correct":"4","level":"3","hint":"<p>Hãy áp d\u1ee5ng \u0111\u1ecbnh lý Avogadro và ph\u01b0\u01a1ng trình hóa h\u1ecdc c\u1ee7a ph\u1ea3n \u1ee9ng \u0111\u1ed1t cháy P \u0111\u1ec3 tính toán l\u01b0\u1ee3ng khí oxygen c\u1ea7n thi\u1ebft.<\/p>","answer":"<p>\u0110áp án \u0111úng:<strong> D. 3,099 lít.<\/strong><\/p><p>n<span class=\"math-tex\">$_{P}$<\/span> = 3,1 \/ 31 = 0,1 mol<\/p><p>PTHH: 4P + 5O<span class=\"math-tex\">$_{2}$<\/span> -> 2P<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{5}$<\/span><\/p><p>n<span class=\"math-tex\">$_{O_{2}}$<\/span> = 0,1.5\/4 = 0,125 (mol)<\/p><p>Th\u1ec3 tích oxi c\u1ea7n dùng là: V = 22,4.n = 24,79.0,125 = 3,1 lít<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 08:21:08","option_type":"txt","len":2},{"id":"7705","post_id":"8542","mon_id":"1159539","chapter_id":"1159541","question":"<p>\u0110\u1ec3 \u0111\u1ed1t cháy hoàn toàn a gam Al c\u1ea7n dùng h\u1ebft 19,2 gam oxygen, sau ph\u1ea3n \u1ee9ng s\u1ea3n ph\u1ea9m là Al<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{3}$<\/span>. Giá tr\u1ecb c\u1ee7a a là:<\/p>","options":["A. 21,6 gam","B. 16,2 gam","C. 18,0 gam","D. 27,0 gam"],"correct":"1","level":"3","hint":"<p>Hãy áp d\u1ee5ng \u0111\u1ecbnh lý b\u1ea3o toàn kh\u1ed1i l\u01b0\u1ee3ng và ph\u1ea3n \u1ee9ng gi\u1eefa Al và O<span class=\"math-tex\">$_{2}$<\/span> \u0111\u1ec3 xác \u0111\u1ecbnh m\u1ed1i quan h\u1ec7 gi\u1eefa kh\u1ed1i l\u01b0\u1ee3ng Al và O<span class=\"math-tex\">$_{2}$<\/span>.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>A. 21,6 gam<\/strong><\/p><p>n<span class=\"math-tex\">$_{O_{2}}$<\/span> = 19,6 \/ 32 = 0,6 (mol)<\/p><p>PTHH: 4Al + 3O<span class=\"math-tex\">$_{2}$<\/span> -> 2Al<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{3}$<\/span><\/p><p>n<span class=\"math-tex\">$_{Al}$<\/span> = 0,6.4\/3 = 0,8 (mol)<\/p><p>kh\u1ed1i l\u01b0\u1ee3ng Al ph\u1ea3n \u1ee9ng là: m<span class=\"math-tex\">$_{Al}$<\/span> = 0,8.27 = 21,6 gam<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-27 08:26:06","option_type":"txt","len":1}]}